Composition comprising hfc and hfo

ABSTRACT

The present invention provides a composition comprising a mixture of HFC and HFO and having improved lubrication performance. Specifically, the present invention provides a composition comprising HFC and HFO, wherein the composition comprises 1) at least one of HFC-134a and HFC-134 as the HFC, 2) at least one of HFO-1234yf and HFO-1234ze as the HFO, and 3) at least one member selected from the group consisting of HCFC-1122, HCFC-124, CFC-1113, and 3,3,3-trifluoropropyne as a third component.

TECHNICAL FIELD

The present invention relates to a composition comprising HFC and HFO.HFC denotes hydrofluorocarbon, and HFO denotes hydrofluoroolefin.

BACKGROUND ART

Amid worldwide discussion about global warming as a highly seriousissue, the development of environmentally preferable refrigeration andair conditioning equipment have become increasingly important.Refrigerants have an impact on warming, and are greatly involved in theperformance of refrigeration and air conditioning equipment; therefore,they play an important role in techniques to reduce emissions of carbondioxide, which affects to warming.

In recent years, there have been various proposals for partiallyfluorinated propene (HFO) having a double bond in the molecule, whichhas lower global-warming potential (GWP) than conventionally known CFC(chlorofluorocarbon), HCFC (hydrochlorofluorocarbon), and HFC.

Known examples of HFO include HFO-1234yf (2,3,3,3-tetrafluoropropene),HFO-1234ze (E- or Z-1,3,3,3-tetrafluoropropene), and the like.

These substances are used singly or in the form of a composition(mixture) for various applications. As such compositions, for example,compositions comprising a mixture of HFC and HFO are known, as describedin PTL 1 to PTL 4.

PTL 1 discloses a refrigerant composition comprising 36 to 50 mass % of1,1,1,2-tetrafluoroethane (HFC-134a) and 50 to 64 mass % of2,3,3,3-tetrafluoropropene (HFO-1234yf).

PTL 2 discloses a refrigerant composition comprising 30 to 50 mass % ofdifluoromethane (HFC-32) and 70 to 50 mass % of2,3,3,3-tetrafluoropropene (HFO-1234yf).

PTL 3 discloses a refrigerant composition comprising difluoromethane(HFC-32), pentafluoroethane (HFC-125), and 2,3,3,3-tetrafluoropropene(HFO-1234yf), wherein the ratio of HFC-32/HFC-125/HFO-1234yf is in arange surrounded by points (0/21/79 mass %), (16.6/25.3/58.1 mass %),and (0/28.4/71.6 mass %) in a ternary diagram of the refrigerantcomposition, and the composition essentially comprises HFC-32.

PTL 4 discloses a heat transfer composition comprising (a) from about20% to about 30% by weight of HFC-32, (b) from about 20% to about 30% byweight of HFC-125, (c) from about 0% to about 15% by weight ofHFO-1234yf and from about 10% to about 30% by weight of HFO-1234ze, and(d) from about 15% to about 30% by weight of HFC-134a, with the weightpercent being based on the total of the components (a) to (d) in thecomposition.

Although CFC and HCFC have lubrication performance, the lubricationperformance of a composition comprising a mixture of HFC and HFO islower than those of CFC and/or HCFC. In particular, when such acomposition is used as a refrigerant composition, the lubricationperformance as a whole is generally ensured by using a lubricating oil(refrigerant oil) in combination. In this respect, it is desirable toimprove the lubrication performance of the composition comprising amixture of HFC and HFO before a lubricating oil is used in combination.This improvement has become an issue.

CITATION LIST Patent Literature

-   PTL 1: WO2010/002020 (JP2011-525205A)-   PTL 2: WO2011/093521 (JP2013-501820A)-   PTL 3: WO2010/002014 (JP2011-525204A)-   PTL 4: WO2012/151238 (JP2014-514423A)

SUMMARY OF INVENTION Technical Problem

An object of the present invention is to provide a compositioncomprising a mixture of HFC and HFO, and having improved lubricationperformance.

Solution to Problem

The present inventor conducted extensive research to achieve the aboveobject, and consequently found that the above object can be achieved bya composition comprising HFC and HFO, and further comprising a specificthird component. Thus, the present invention has been completed.

That is, the present invention relates to the following compositionscomprising HFC and HFO.

1. A composition comprising HFC and HFO, wherein the compositioncomprises:

1) at least one of HFC-134a and HFC-134 as the HFC;

2) at least one of HFO-1234yf and HFO-1234ze as the HFO; and

3) at least one member selected from the group consisting of HCFC-1122,HCFC-124, CFC-1113, and 3,3,3-trifluoropropyne as a third component.

2. A composition comprising HFC and HFO, wherein the compositioncomprises:

1) HFC-32 as the HFC;

2) at least one of HFO-1234yf and HFO-1234ze as the HFO; and

3) at least one member selected from the group consisting of HCC-40,HCFC-22, and 3,3,3-trifluoropropyne as a third component.

3. A composition comprising HFC and HFO, wherein the compositioncomprises:

1) HFC-125 as the HFC;

2) at least one of HFO-1234yf and HFO-1234ze as the HFO; and

3) at least one of CFC-115 and 3,3,3-trifluoropropyne as a thirdcomponent.

4. A composition comprising HFCs and HFO, wherein the compositioncomprises:

1) HFC-32 and HFC-125 as the HFCs;

2) at least one of HFO-1234yf and HFO-1234ze as the HFO; and

3) at least one member selected from the group consisting of HCC-40,HCFC-22, CFC-115, and 3,3,3-trifluoropropyne as a third component.

5. A composition comprising HFC and HFO, wherein the compositioncomprises:

1) at least one member selected from the group consisting of HFC-32,HFC-125, HFC-134a, and HFC-134 as the HFC;

2) at least one of HFO-1234yf and HFO-1234ze as the HFO; and

3) at least one member selected from the group consisting of HCC-40,HCFC-22, HCFC-124, CFC-115, HCFC-1122, CFC-1113, and3,3,3-trifluoropropyne as a third component.

6. The composition according to any one of the above items 1 to 5,wherein the total amount of the HFC and the HFO is 95 mass % or morewhen the total amount of the HFC, the HFO, and the third component is100 mass %.7. The composition according to any one of the above items 1 to 6, whichis a refrigerant composition.8. The composition according to any one of the above items 1 to 7,wherein the composition further comprises a refrigerant oil in an amountof 10 to 50 mass % in the composition.9. The composition according to any one of the above items 2 and 4 to 8,wherein HCC-40 is contained in an amount of 1 mass % or less when thetotal amount of the HFC, the HFO, and the third component is 100 mass %.

Advantageous Effects of Invention

The compositions of the present invention have improved lubricationperformance because they comprise HFC and HFO, and further comprise aspecific third component (at least one of specific chlorine-containingsubstances and 3,3,3-trifluoropropyne, i.e., at least one of HCFC-1122,HCFC-124, CFC-1113, HCC-40, HCFC-22, CFC-115, and3,3,3-trifluoropropyne). The compositions of the present invention areuseful as refrigerant compositions, for example.

BRIEF DESCRIPTION OF DRAWING

FIG. 1 is a schematic view of a thrust-type friction and abrasion tester(pin-on-disk type) used in an abrasion test in the Examples andComparative Examples.

DESCRIPTION OF EMBODIMENTS

The compositions of the present invention comprise HFC and HFO, andfurther comprise a specific third component (at least one of specificchlorine-containing substances and 3,3,3-trifluoropropyne, i.e., atleast one of HCFC-1122, HCFC-124, CFC-1113, HCC-40, HCFC-22, CFC-115,and 3,3,3-trifluoropropyne), and can be classified into the followingEmbodiments 1 to 5 depending on the combination of HFC, HFO, and thirdcomponent. The components constituting the composition of the presentinvention are defined in Table 1.

TABLE 1 Code Structure Chemical Name HFC-134a CF₃CH₂F1,1,1,2-tetrafluoroethane HFC-134 CF₂HCF₂H 1,1,2,2-tetrafluoroethaneHFC-32 CH₂F₂ Difluoromethane HFC-125 C₂HF₅ Pentafluoroethane HFO-1234yfCF₃CF═CH₂ 2,3,3,3-tetrafluoropropene HFO-1234ze CF₃CH═CHF E- orZ-1,3,3,3-tetrafluoropropene HCFC-1122 CF₂═CHCl2,2-difluoro-1-chloroethylene HCFC-124 CF₃CFClH1,1,1,2-tetrafluoroethane HCC-40 CH₃Cl Chloromethane CFC-1113 CF₂═CClFChlorotrifluoroethylene HCFC-22 CHF₂Cl Chlorodifluoromethane CFC-115CF₂ClCF₃ Chloropentafluoroethane — CF₃C≡CH 3,3,3-trifluoropropyne

Composition of Embodiment 1

The composition of Embodiment 1 comprises HFC and HFO, wherein thecomposition comprises:

1) at least one of HFC-134a and HFC-134 as the HFC;

2) at least one of HFO-1234yf and HFO-1234ze as the HFO; and

3) at least one member selected from the group consisting of HCFC-1122,HCFC-124, CFC-1113, and 3,3,3-trifluoropropyne as a third component.

Compared with a composition comprising only a combination of HFC and HFOmentioned above, the composition of Embodiment 1 has improvedlubrication performance because it comprises, in addition to thecombination of HFC and HFO mentioned above, at least one of HCFC-1122,HCFC-124, CFC-1113, and 3,3,3-trifluoropropyne as a third component.

In Embodiment 1, HFO-1234yf and HFO-1234ze may be used singly or mixedat any ratio for use. When HFO-1234yf and HFO-1234ze are mixed, it ispreferable that the HFO-1234yf content is 1 to 99 mass %, and theHFO-1234ze content is 99 to 1 mass %, when the total amount of the HFOsis 100 mass %.

In Embodiment 1, options for the third component preferably include atleast three members: HCFC-1122, HCFC-124, and CFC-1113, and may furtherinclude 3,3,3-trifluoropropyne. The content of each of these thirdcomponents is not limited; however, among the third components, theCFC-1113 content is preferably higher.

In Embodiment 1, the total amount of HFC and HFO is preferably 95 mass %or more when the total amount of the HFC, the HFO, and the thirdcomponent (at least one of HCFC-1122, HCFC-124, CFC-1113, and3,3,3-trifluoropropyne) is 100 mass %. In other words, the content ofthe third component is preferably less than 5 mass %. Although thelubrication performance is maintained even when the content of the thirdcomponent is 5 mass % or more, less than 5 mass % is preferred in orderto maintain the properties of the mixture composition of HFC and HFO.

Composition of Embodiment 2

The composition of Embodiment 2 comprises HFC and HFO, wherein thecomposition comprises:

1) HFC-32 as the HFC;

2) at least one of HFO-1234yf and HFO-1234ze as the HFO; and

3) at least one member selected from the group consisting of HCC-40,HCFC-22, and 3,3,3-trifluoropropyne as a third component.

Compared with a composition comprising only a combination of HFC and HFOmentioned above, the composition of Embodiment 2 has improvedlubrication performance because it comprises, in addition to thecombination of HFC and HFO mentioned above, at least one of HCC-40,HCFC-22, and 3,3,3-trifluoropropyne as a third component.

In Embodiment 2, HFO-1234yf and HFO-1234ze may be used singly or mixedat any ratio for use. When HFO-1234yf and HFO-1234ze are mixed, it ispreferable that the HFO-1234yf content is 1 to 99 mass %, and theHFO-1234ze content is 99 to 1 mass %, when the total amount of the HFOsis 100 mass %.

In Embodiment 2, options for the third component preferably include atleast two members: HCC-40 and HCFC-22, and may further include3,3,3-trifluoropropyne. The content of each of these third components isnot limited. When a composition comprising HCC-40 is used as arefrigerant composition, HCC-40 may react with aluminum, which isassumed to be used as a piping material of a refrigerator, and therebyproduce an explosive substance. Therefore, when HCC-40 is contained, itscontent is preferably 1 mass % or less when the total amount of the HFC,the HFO, and the third component (at least one member selected from thegroup consisting of HCC-40, HCFC-22, and 3,3,3-trifluoropropyne) is 100mass %.

In Embodiment 2, the total amount of HFC and HFO is preferably 95 mass %or more when the total amount of the HFC, the HFO, and the thirdcomponent (at least one member selected from the group consisting ofHCC-40, HCFC-22, and 3,3,3-trifluoropropyne) is 100 mass %. In otherwords, the content of the third component is preferably less than 5 mass%. Although the lubrication performance is maintained even when thecontent of the third component is 5 mass % or more, less than 5 mass %is preferred in order to maintain the properties of the mixturecomposition of HFC and HFO.

Composition of Embodiment 3

The composition of Embodiment 3 comprises HFC and HFO, wherein thecomposition comprises:

1) HFC-125 as the HFC;

2) at least one of HFO-1234yf and HFO-1234ze as the HFO; and

3) at least one of CFC-115 and 3,3,3-trifluoropropyne as a thirdcomponent.

Compared with a composition comprising only a combination of HFC and HFOmentioned above, the composition of Embodiment 3 has improvedlubrication performance because it comprises, in addition to thecombination of HFC and HFO mentioned above, at least one of CFC-115 and3,3,3-trifluoropropyne as a third component.

In Embodiment 3, HFO-1234yf and HFO-1234ze may be used singly or mixedat any ratio for use. When HFO-1234yf and HFO-1234ze are mixed, it ispreferable that the HFO-1234yf content is 1 to 99 mass %, and theHFO-1234ze content is 99 to 1 mass %, when the total amount of the HFOsis 100 mass %.

In Embodiment 3, options for the third component preferably include atleast CFC-115, and may further include 3,3,3-trifluoropropyne. Thecontent of each of these third components is not limited; however, amongthe third components, the CFC-115 content is preferably higher.

In Embodiment 3, the total amount of HFC and HFO is preferably 95 mass %or more when the total amount of the HFC, the HFO, and the thirdcomponent (at least one of CFC-115 and 3,3,3-trifluoropropyne) is 100mass %. In other words, the content of the third component is preferablyless than 5 mass %. Although the lubrication performance is maintainedeven when the content of the third component is 5 mass % or more, lessthan 5 mass % is preferred in order to maintain the properties of themixture composition of HFC and HFO.

Composition of Embodiment 4

The composition of Embodiment 4 comprises HFCs and HFO, wherein thecomposition comprises:

1) HFC-32 and HFC-125 as the HFCs;

2) at least one of HFO-1234yf and HFO-1234ze as the HFO; and

3) at least one member selected from the group consisting of HCC-40,HCFC-22, CFC-115, and 3,3,3-trifluoropropyne as a third component.

Compared with a composition comprising only a combination of HFC and HFOmentioned above, the composition of Embodiment 4 has improvedlubrication performance because it comprises, in addition to thecombination of HFC and HFO mentioned above, at least one of HCC-40,HCFC-22, CFC-115, and 3,3,3-trifluoropropyne as a third component.

In Embodiment 4, HFO-1234yf and HFO-1234ze may be used singly or mixedat any ratio for use. When HFO-1234yf and HFO-1234ze are mixed, it ispreferable that the HFO-1234yf content is 1 to 99 mass %, and theHFO-1234ze content is 99 to 1 mass %, when the total amount of the HFOsis 100 mass %.

In Embodiment 4, options for the third component preferably include atleast three members: HCC-40, HCFC-22, and CFC-115, and may furtherinclude 3,3,3-trifluoropropyne. The content of each of these thirdcomponents is not limited; however, among the third components, theCFC-115 content is preferably higher. When a composition comprisingHCC-40 is used as a refrigerant composition, HCC-40 may react withaluminum, which is assumed to be used as a piping material of arefrigerator, and thereby produce an explosive substance. Therefore,when HCC-40 is contained, its content is preferably 1 mass % or lesswhen the total amount of the HFC, the HFO, and the third component (atleast one member selected from the group consisting of HCC-40, HCFC-22,CFC-115, and 3,3,3-trifluoropropyne) is 100 mass %.

In Embodiment 4, the total amount of HFC and HFO is preferably 95 mass %or more when the total amount of the HFC, the HFO, and the thirdcomponent (at least one member selected from the group consisting ofHCC-40, HCFC-22, CFC-115, and 3,3,3-trifluoropropyne) is 100 mass %. Inother words, the content of the third component is preferably less than5 mass %. Although the lubrication performance is maintained even whenthe content of the third component is 5 mass % or more, less than 5 mass% is preferred in order to maintain the properties of the mixturecomposition of HFC and HFO.

Composition of Embodiment 5

The composition of Embodiment 5 comprises HFC and HFO, wherein thecomposition comprises:

1) at least one member selected from the group consisting of HFC-32,HFC-125, HFC-134a, and HFC-134 as the HFC;

2) at least one of HFO-1234yf and HFO-1234ze as the HFO; and

3) at least one member selected from the group consisting of HCC-40,HCFC-22, HCFC-124, CFC-115, HCFC-1122, CFC-1113, and3,3,3-trifluoropropyne as a third component.

Compared with a composition comprising only a combination of HFC and HFOmentioned above, the composition of Embodiment 5 has improvedlubrication performance because it comprises, in addition to thecombination of HFC and HFO mentioned above, at least one of HCC-40,HCFC-22, HCFC-124, CFC-115, HCFC-1122, CFC-1113, and3,3,3-trifluoropropyne as a third component.

In Embodiment 5, HFO-1234yf and HFO-1234ze may be used singly or mixedat any ratio for use. When HFO-1234yf and HFO-1234ze are mixed, it ispreferable that the HFO-1234yf content is 1 to 99 mass %, and theHFO-1234ze content is 99 to 1 mass %, when the total amount of the HFOsis 100 mass %.

In Embodiment 5, options for the third component preferably include atleast six members: HCC-40, HCFC-22, HCFC-124, CFC-115, HCFC-1122, andCFC-1113, and may further include 3,3,3-trifluoropropyne. The content ofeach of these third components is not limited; however, among the thirdcomponents, the CFC-1113 and CFC-115 contents are preferably higher.When a composition comprising HCC-40 is used as a refrigerantcomposition, HCC-40 may react with aluminum, which is assumed to be usedas a piping material of a refrigerator, and thereby produce an explosivesubstance. Therefore, when HCC-40 is contained, its content ispreferably 1 mass % or less when the total amount of the HFC, the HFO,and the third component (at least one member selected from the groupconsisting of HCC-40, HCFC-22, HCFC-124, CFC-115, HCFC-1122, CFC-1113,and 3,3,3-trifluoropropyne) is 100 mass %.

In Embodiment 5, the total amount of HFC and HFO is preferably 95 mass %or more when the total amount of the HFC, the HFO, and the thirdcomponent (at least one member selected from the group consisting ofHCC-40, HCFC-22, HCFC-124, CFC-115, HCFC-1122, CFC-1113, and3,3,3-trifluoropropyne) is 100 mass %. In other words, the content ofthe third component is preferably less than 5 mass %. Although thelubrication performance is maintained even when the content of the thirdcomponent is 5 mass % or more, less than 5 mass % is preferred in orderto maintain the properties of the mixture composition of HFC and HFO.

Matter Common to Compositions of Embodiments 1 to 5

The compositions of Embodiments 1 to 5 (the compositions of the presentinvention) have improved lubrication performance because they compriseHFC and HFO, and further comprise a specific third component (at leastone of specific chlorine-containing substances and3,3,3-trifluoropropyne, i.e., at least one of HCFC-1122, HCFC-124,CFC-1113, HCC-40, HCFC-22, CFC-115, and 3,3,3-trifluoropropyne).

The compositions of the present invention can be used for variousapplications, such as refrigerant compositions, aerosol propellants,foaming agents, blowing agents, solvents, cleaning agents, dispersionmedia, displacement drying agents, buffing abrasive agents,polymerization media, swelling agents, and fire suppression agents.

Among these applications, the compositions of the present invention canbe particularly suitably used as refrigerant compositions because theyhave improved lubrication performance. For example, the compositions ofthe present invention can be suitably used in various refrigerators,such as car air conditioners, vending machine refrigerators, commercialand home air conditioners, gas heat pumps (GHPs), and electrical heatpumps (EHPs). When used as a refrigerant composition, the composition ofthe present invention may further contain a refrigerant oil, ifnecessary. The refrigerant oil content, when used, is preferably setwithin the range of 10 to 50 mass % of the refrigerant composition.

EXAMPLES

The present invention is described in detail below with reference toExamples and Comparative Examples. However, the present invention is notlimited to these Examples.

In the Examples and the Comparative Examples, the lubricationperformance of each composition was evaluated from the results of anabrasion test and a baking test. The methods of the abrasion test andthe baking test are as described below.

Abrasion Test

Using a thrust-type friction and abrasion tester (pin-on-disk type: seeFIG. 1), abrasion loss was measured by the abrasion test using eachcomposition.

Baking Test

Baking load was measured by the baking test using each composition, inwhich a rod (shaft material) was pressed to a rotating disk (bearingmaterial) while applying a load. The baking load was evaluated as arelative value when the baking load in the Comparative Example wasregarded as 100.

Example 1-1 (Refrigerant Composition of Embodiment 1) and ComparativeExample 1-1

The compositions of Example 1-1 and Comparative Example 1-1 wereprepared according to the formulations shown in Table 2.

TABLE 2 Comparative Example 1-1 Example 1-1 HFC-134a + HFC134 (60 mass%) 99.5 mass % 100 mass % HFO-1234yf (39.5 mass %) HCFC-1122 (0.3 mass%)  0.5 mass % — HCFC-124 (0.1 mass %) CFC-1113 (0.05 mass %)3,3,3-trifluoropropyne (0.05 mass %)

Table 3 below shows the test results.

TABLE 3 Comparative Example 1-1 Example 1-1 Abrasion test (abrasionloss) 4.0 μm 4.3 μm Baking test (load) 107 100

The results of Table 3 revealed that the lubrication performance wasimproved by adding a third component.

Examples 1-2 to 1-4 (Refrigerant Composition of Embodiment 1)

The compositions of Examples 1-2 to 1-4 were prepared according to theformulations shown in Table A.

TABLE A Example Example Example 1-2 1-3 1-4 HFC-134a + HFC134 99.5 mass% 99.5 mass %  99.5 mass %  (60 mass %) HFO-1234yf (39.5 mass %)HCFC-1122  0.5 mass % 0.3 mass % 0.3 mass % HCFC-124 — 0.2 mass % 0.1mass % CFC-1113 — — 0.1 mass % Total  100 mass % 100 mass %  100 mass % 

Table B below shows the test results.

TABLE B Example Example Example 1-2 1-3 1-4 Abrasion test (abrasionloss) 4.0 μm 4.0 μm 4.0 μm Baking test (load) 107 107 107

The results of Table B revealed that the lubrication performance wasimproved by adding a third component.

Example 1-5 (Refrigerant Composition of Embodiment 1) and ComparativeExample 1-2

The compositions of Example 1-5 and Comparative Example 1-2 wereprepared according to the formulations shown in Table C.

TABLE C Comparative Example 1-5 Example 1-2 HFC-134a + HFC134 (60 mass%) 99.5 mass % 100 mass % HFO-1234ze (39.5 mass %) HCFC-1122 (0.3 mass%)  0.5 mass % — HCFC-124 (0.1 mass %) CFC-1113 (0.05 mass %)3,3,3-trifluoropropyne (0.05 mass %) Total  100 mass % 100 mass %

Table D below shows the test results.

TABLE D Comparative Example 1-5 Example 1-2 Abrasion test (abrasionloss) 4.2 μm 4.5 μm Baking test (load) 106 100

The results of Table D revealed that the lubrication performance wasimproved by adding a third component.

Example 2 (Refrigerant Composition of Embodiment 2) and ComparativeExample 2

The compositions of Example 2 and Comparative Example 2 were preparedaccording to the formulations shown in Table 4.

TABLE 4 Comparative Example 2 Example 2 HFC-32 (69.5 mass %) 99.5 mass %100 mass % HFO-1234yf (30 mass %) HCC-40 (0.25 mass %)  0.5 mass % —HCFC-22 (0.2 mass %) 3,3,3-trifluoropropyne (0.05 mass %)

Table 5 below shows the test results.

TABLE 5 Comparative Example 2 Example 2 Abrasion test (abrasion loss)4.1 μm 4.4 μm Baking test (load) 106 100

The results of Table 5 revealed that the lubrication performance wasimproved by adding a third component.

Example 3 (Refrigerant Composition of Embodiment 3) and ComparativeExample 3

The compositions of Example 3 and Comparative Example 3 were preparedaccording to the formulations shown in Table 6.

TABLE 6 Comparative Example 3 Example 3 HFC-125 (60 mass %) 99.5 mass %100 mass % HFO-1234yf (39.5 mass %) CFC-115 (100 mass %)  0.5 mass % —

Table 7 below shows the test results.

TABLE 7 Comparative Example 3 Example 3 Abrasion test (abrasion loss)3.9 μm 4.3 μm Baking test (load) 107 100

The results of Table 7 revealed that the lubrication performance wasimproved by adding a third component.

Example 4 (Refrigerant Composition of Embodiment 4) and ComparativeExample 4

The compositions of Example 4 and Comparative Example 4 were preparedaccording to the formulations shown in Table 8.

TABLE 8 Comparative Example 4 Example 4 HFC-32 (30 mass %) 99.5 mass %100 mass % HFC-125 (30 mass %) HFO-1234ze (39.5 mass %) HCC-40 (0.1 mass%)  0.5 mass % — HCFC-22 (0.1 mass %) CFC-115 (0.4 mass %)

Table 9 below shows the test results.

TABLE 9 Comparative Example 4 Example 4 Abrasion test (abrasion loss)4.0 μm 4.3 μm Baking test (load) 107 100

The results of Table 9 revealed that the lubrication performance wasimproved by adding a third component.

Example 5 (Refrigerant Composition of Embodiment 5) and ComparativeExample 5

The compositions of Example 5 and Comparative Example 5 were preparedaccording to the formulations shown in Table 10.

TABLE 10 Comparative Example 5 Example 5 HFC-32 (25 mass %) 99.5 mass %100 mass % HFC-125 (25 mass %) HFC-134a + HFC-134 (10 mass %) HFO-1234ze(39.5 mass %) HCC-40 (0.05 mass %)  0.5 mass % — HCFC-1122 (0.05 mass %)HCFC-22 (0.05 mass %) HCFC-124 (0.05 mass %) CFC-1113 (0.05 mass %)CFC-115 (0.25 mass %)

Table 11 below shows the test results.

TABLE 11 Comparative Example 5 Example 5 Abrasion test (abrasion loss)4.0 μm 4.3 μm Baking test (load) 107 100

The results of Table 11 revealed that the lubrication performance wasimproved by adding a third component.

1. A composition comprising HFC and HFO, wherein the compositioncomprises: 1) HFC-32 as the HFC; 2) at least one of HFO-1234yf andHFO-1234ze as the HFO; and 3) at least one member selected from thegroup consisting of HCC-40, HCFC-22, and 3,3,3-trifluoropropyne as athird component.
 2. The composition according to claim 1, wherein thetotal amount of the HFC and the HFO is 95 mass % or more when the totalamount of the HFC, the HFO, and the third component is 100 mass %. 3.The composition according to claim 1, which is a refrigerantcomposition.
 4. The composition according to claim 1, wherein thecomposition further comprises a refrigerant oil in an amount of 10 to 50mass % in the composition.
 5. The composition according to claim 1,wherein HCC-40 is contained in an amount of 1 mass % or less when thetotal amount of the HFC, the HFO, and the third component is 100 mass %.